fat metabolism, unsaturated fatty acids Flashcards

1
Q

hyperlipidaemia?

A

increased triglycerides in plasma

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2
Q

in which dog breed is hyperlipidaemia hereditary?

A

Minature schnauzers

consequence may be pancreatitis

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3
Q

how long does it normally take for clearance of triglycerides after a meal?

A

12-14 hrs

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4
Q

what can cats develop due to hypertryglyceraemia?

A

Xanthomas in the skin and other tissues

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5
Q

what ae the reasons for xanthomas?

A

hereditary

spontaneous

diabetes mellitus

high fat diet

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6
Q

Hypercholesterolaemia?

A

increased cholesterol in the plasma

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7
Q

features of atherosclerosis in dogs and cats?

A

dogs and cats are resistant to athersclerosis associated with hypercholesterolaemia

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8
Q

what is the reson behind the atherosclerosis resistance in dogs and cats?

A

because of the high circulating amount of HDL

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9
Q

pathogenesis of hyperlipaemia?

A

negative energy balance triggering excessive mobilisation of fatty acids from adipose tissue

this leads to increased hepatic triglyceride synthesis

eventually leading to fat infiltration in the liver

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10
Q

in which species is hyperlipaemia usually a primary disease process associated with obesity?

A

Horses

EMS - equine metabolic syndrome

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11
Q

in which species is fatty liver most commonly seen?

A

Dairy cattle

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12
Q

what are the benifits of L - carnitine in the diet believed to be?

A
  • improving of cardiovascular health
  • may help heart attack survivors
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13
Q

what are the disadvantages of L-carnithine in the diet?

A

in red meat

production of trimethylamine - N- oxide which stimulates antherosclerosis

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14
Q

list the features of trans fatty acids?

A
  • Upto 15% of tissue FA
  • decreased membrane fluidity
  • Promotes cholesterol absorption
  • may antagonise the metabolism of cis essential FAs
    • Margarine
    • milk (in small quantities)
    • meat (in small quantities)
      *
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15
Q

Milk and dairy products contain a considerable amount of?

A

Conjugated linolenic acid (CLA)

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16
Q

what is the role and importance of unsaturated fatty acids?

A
  1. component of triglycerides
  2. component of membrane phospholipids
  3. starting molecule for eicosanoids
  4. sensitive for the attack of reactive molecules (ROS, RNS) : Lipidperoxidation
17
Q

unsaturated fatty acid role in the cell membrane?

A

maintains elasticity of the cell membrane

influences membrane transport

18
Q

proportion of omega 3: omega 6?

A

used to be 1:1

now adays 1:20

19
Q

Physiological role of ROS?

A

regulation of cellular mechanisms

signal transduction processes

regulation of cell division

inflammatory processes

Apoptosis

20
Q

Pathological role of ROS?

A

damages:

DNA, Proteins, Lipoproteins, polyunsaturated fatty acids

21
Q

ways of protection against ROS?

A
  • Antioxidant protection
  • Enzymatic protection
22
Q

Antioxidant protection against ROS?

A
  • Vitamin E
  • Vitamin C, uric acid
  • Flavanoids
  • Ubiquinone
  • carotenoids, Vitamin A
  • Glutathione
23
Q

Enzymatic protection against ROS?

A
  • Superoxide dismutase
  • Catalase
  • Peroxidases
24
Q
A